Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: A equipe visitante de Richmond jogou em que terrenos?
 ###Tabelas: CREATE TABLE round_of_16 (round_of_16_id AUTO_INCREMENT PRIMARY KEY, Home team VARCHAR, Home team score VARCHAR, Away team VARCHAR, Away team score VARCHAR, Ground VARCHAR, Crowd INT, Date VARCHAR, Time VARCHAR) CREATE TABLE a (a_id AUTO_INCREMENT PRIMARY KEY, Player VARCHAR, No. VARCHAR, Nationality VARCHAR, Position VARCHAR, Years in Toronto VARCHAR, School/Club Team VARCHAR) CREATE TABLE gothic (gothic_id AUTO_INCREMENT PRIMARY KEY, Class VARCHAR, Part 1 VARCHAR, Part 2 VARCHAR, Part 3 VARCHAR, Part 4 VARCHAR, Verb meaning VARCHAR) CREATE TABLE fall_1999 (fall_1999_id AUTO_INCREMENT PRIMARY KEY, 7:00 am VARCHAR, 7:30 am VARCHAR, 8:00 am VARCHAR, 9:00 am VARCHAR, 10:00 am VARCHAR, 11:00 am VARCHAR, noon VARCHAR, 12:30 pm VARCHAR, 1:00 pm VARCHAR, 1:30 pm VARCHAR, 2:00 pm VARCHAR, 3:00 pm VARCHAR, 3:30 pm VARCHAR, 4:00 pm VARCHAR, 4:30 pm VARCHAR, 5:00 pm VARCHAR, 6:30 pm VARCHAR) CREATE TABLE all-time_ranking_in_the_championship_playoff_since_the_introduction_of_the_playoff_system_in_2009 (all-time_ranking_in_the_championship_playoff_since_the_introduction_of_the_playoff_system_in_2009_id AUTO_INCREMENT PRIMARY KEY, Rank INT, Club VARCHAR, Seasons INT, Played INT, Drew INT, Lost INT, Points INT, Avg. Points INT, Goals for INT, Goals against INT, Goal diff INT)  
SELECT Ground FROM round_of_16 WHERE Away team = Richmond